Power Transistor Anomaly Power Transistor Error - Mitsubishi Heavy Industries FDT90VNPWVH Service Manual

(5) Self-diagnosis table
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Wired
(2)
Indoor unit display panel
remote
control
RUN TIMER
display
light light
1-time
ON —
flash
2-time
ON —
flash
3-time
ON —
flash
6-time
ON E 16
flash
Keeps
1-time
E 38
flashing
flash
2-time
Keeps
E 37
flashing
flash
Keeps 4-time
E 39
flashing flash
1-time
ON E 42
flash
2-time
ON E 59
flash
3-time
ON E 58
flash
4-time
ON E 51
flash
5-time
ON E 36
flash
6-time
E 5
ON
flash
7-time
ON E 48
flash
Keeps
ON E 35
flashing
2-time 2-time
E 60
flash flash
5-time
ON E 47
flash
7-time
ON E 57
flash
7-time 1-time
E 40
flash flash
— — E 1
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Description
Cause
of trouble
• Broken heat exchanger sensor
Heat exchanger 1 wire, poor connector
sensor 1 error connection
• Indoor unit PCB is faulty
• Broken room temperature
Room
sensor wire, poor connector
temperature
connection
sensor error
• Indoor unit PCB is faulty
• Broken heat exchanger sensor
2 wire, poor connector
Heat exchanger
connection
sensor 2 error
• Indoor unit PCB is faulty
Indoor fan • Defective fan motor, poor
motor error connector connection
• Broken outdoor air temp.
Outdoor air
sensor wire, poor connector
temperature
connection
sensor error
• Outdoor unit PCB is faulty
• Broken heat exchanger sensor
Outdoor heat
wire, poor connector
exchanger
connection
sensor error
• Outdoor unit PCB is faulty
• Broken discharge pipe sensor
Discharge pipe wire, poor connector
sensor error connection
• Outdoor PCB is faulty
• Compressor locking, open phase
on compressor output, short-
Current cut
circuit on power transistor
service valve is closed
Compressor • Defective compressor
startup failure • Outdoor unit PCB is faulty
• Overload operation
Current safe
• Overcharge
stop
• Compressor locking
Power
• Power transistor error
transistor
(Outdoor unit PCB is faulty)
anomaly
• Installation, operation status
Discharge pipe
temperature • Discharge pipe temperature sensor
error • Outdoor unit PCB is faulty
• Defective power source,
Error of signal
Broken signal wire, defective
transmission
indoor/outdoor PCB
Outdoor fan
• Defective fan motor, poor
motor error
connector connection
• Installation, operation status
Cooling
• Outdoor heat exchanger
overload
temperature sensor
operation
• Outdoor unit PCB is faulty
Compressor
• Defective compressor
rotor lock error
Active filter
• Outdoor unit PCB is faulty
voltage error
Insufficient refri-
gerant amount or • Operation status
detection of servi-
• Installation status
ce valve closure
Service valve
• Service valve (gas side) closed
(gas side)
• Defective outdoor unit PCB
closed opertion
Error of wired
• Broken wired remote control
remote control
wire, defective indoor unit PCB
wiring
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Display (flashing) condition
When a heat exchanger sensor 1 wire disconnection is detected while
operation is stopped. (If a temperature of –28ºC or lower is detected for
15 seconds, it is judged that the wire is disconnected.)
(Not displayed during operation.)
When a room temperature sensor wire disconnection is detected while
operation is stopped. (If a temperature of –45ºC or lower is detected for
15 seconds, it is judged that the wire is disconnected.)
(Not displayed during operation.)
When a heat exchanger sensor 2 wire disconnection is detected while
operation is stopped. (If a temperature of –28ºC or lower is detected for
15 seconds, it is judged that the wire is disconnected.)
(Not displayed during operation.)
When conditions for turning the indoor unit's fan motor on exist during air-
conditioner operation, an indoor unit fan motor speed of 300 min
measured for 30 seconds or longer. (The air-conditioner stops.)
–55ºC or lower is detected for 5 seconds continuously 3 times within
40 minutes after initial detection of this anomalous temperature.
Or –55ºC or lower is detected for within 20 seconds after power ON.
(The compressor is stopped.)
–55ºC or lower is detected for 5 seconds continuously 3 times within
40 minutes after initial detection of this anomalous temperature.
Or –55ºC or lower is detected for within 20 seconds after power ON.
(The compressor is stopped.)
–25ºC or lower is detected for 5 seconds continuously 3 times within 40
minutes after initial detection of this anomalous temperature.
(The compressor is stopped.)
The compressor output current exceeds the set value during compressor
start.
,
(The air-conditioner stops.)
If compressor fails to startup for 42 times.
When the compressor command speed is lower than the set value and
the current safe has operated. (the compressor stops)
If the power transistor primary current exceeds the setting value for 3
seconds, the compressor stops.
When discharge pipe temperature anomaly is detected 2 times within
60 minutes is compressor stop.
When there is no signal between the indoor unit PCB and outdoor unit
PCB for 10 seconds or longer (when the power is turned on), or when
there is no signal for 7 minute 35 seconds or longer (during operation)
(the compressor is stopped).
When the outdoor fan motor speed continues for 30 seconds or longer
at 75 min or lower. (3 times) (The air-conditioner stops.)
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When the value of the outdoor heat exchanger sensor exceeds the set
value.
If it fails again to detect the rotor position after shifting to the
compressor rotor position detection operation, the compressor stops.
Error is displayed if the converter voltage exceeds target voltage (3 times
within 20 minutes). Remote control may be set after 3-minute delay.
Error is displayed if the converter voltage is lower than 210V.
When the insufficient refrigerant amount is detected 3 times within 60
minutes.
If the output current of inverter exceeds the specifications, it makes the
compressor stopping. (In heating mode).
The wired remote control wire Y is open. The wired remote
control wires X and Y are reversely connected. Noise is penetrating
the wired remote control lines. The wired remote control or indoor unit
PCB is faulty. (The communications circuit is faulty.)
111
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'09•SRK-DB-087D
'19 • PAC-SM-334
or lower is
-1